How about this: Werewolf-go inspired by unicolour go.
In unicolour go, the black stones are not differentiated from the white stones. But the players can remember which is which because they know who played which stone.
In werewolf-go, every player is playing in a different visible colour - so if there are 7 players, then there are 7 visible colours. However, every player is secretly either White or Black, and the 7 visible colours actually don’t matter to the game. So, the visible colours allow us to easily remember who played each stone, but we don’t know if that player is white or black.
One of the two secret colours corresponds to the Werewolf, who are in the minority but know who’s who; the other secret colour corresponds to the Innocents, who are in the majority but do not know who are their teammates.